201121012400403 has 32 divisors (see below), whose sum is σ = 290684925248256. Its totient is φ = 123196806770688.

The previous prime is 201121012400401. The next prime is 201121012400447. The reversal of 201121012400403 is 304004210121102.

It is not a de Polignac number, because 201121012400403 - 2¹ = 201121012400401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201121012400403.

It is not an unprimeable number, because it can be changed into a prime (201121012400401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18720126 + ... + 27435107.

It is an arithmetic number, because the mean of its divisors is an integer number (9083903914008).

Almost surely, 2^{201121012400403} is an apocalyptic number.

201121012400403 is a deficient number, since it is larger than the sum of its proper divisors (89563912847853).

201121012400403 is a wasteful number, since it uses less digits than its factorization.

201121012400403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46157283.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 201121012400403 its reverse (304004210121102), we get a palindrome (505125222521505).

The spelling of 201121012400403 in words is "two hundred one trillion, one hundred twenty-one billion, twelve million, four hundred thousand, four hundred three".